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Engine Performance Optimization
Purpose of using 68491577AA:
or limp mode if NOx levels exceed safe limits
Reduce engine power
Often restarts after sitting (fuel slowly passes through the clog)
19434406 | Genuine Allison® Transmission Control Module For T14 A50 Solenoid Control Fluid Valve Engine Performance OptimizationDescription: A Transmission Electronic Control Module (Transmission ECM or TCM) 19434406 is a specialized computer that manages and controls the automatic transmission system in a vehicle. Part Number: 19434406 Condition: Remanufactured Manufacture Brand: Allison Fits 19434406 For Chevrolet Silverado: 2009, 2010, 2011, 2012, 2013, 2014, 2015 GMC Sierra 2500 HD: 2009, 2010, 2011, 2012, 2013, 2014, 2015 GMC Sierra 3500 HD: 2009, 2010, 2011, 2012, 2013,
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